Ethanol for industrial use — Methods of test — Part 3: Estimation of content of carbonyl compounds p...
The method is applicable to products having carbonyl compounds contents between 0.00025 % (m/m) and 0.01 % (m/m). The principle is based on reaction in acid medium of the carbonyl compounds in a test portion with 2,4-dinitrophenylhydrazine. Formation of the corresponding 2,4-dinitrophenylhydrazones which, after making the solution alkaline, take on a red coloration. Photometric measurement of…
Ethanol for industrial use — Methods of test — Part 4: Estimation of content of carbonyl compounds p...
The method is applicable to products having carbonyl compounds contents equal to or greater than 0.01 % (m/m). The method only allows determination of those carbonyl compounds which react under the specified conditions. The principle is based on the reaction of hydroxylammonium chloride with the carbonyl compounds in a test portion and titration of the hydrochloric acid formed with standard…
Ethanol for industrial use — Methods of test — Part 5: Determination of aldehydes content — Visual c...
The method is applicable to products having aldehyde contents in the range 0.00025 % (m/m) to 0.00125 % (m/m). The principle is based on the reaction of the aldehydes present in a test portion with Schiff reagent. Visual comparison of the colour obtained with the colours of standard colorimetric solutions containing known quantities of acetaldehyde. - International Standards ISO 1388/1 to ISO…
The symbols system is intended for simplifying the preparation of diagrams of products in all branches of industry and is to be used in technical documentation as well as in technical and educational literature. This part contains the following: Motion of links of mechanisms, kinematic pairs, links and connections of their components, and N-bar linkages and their components.
La présente Norme internationale spécifie les symboles graphiques pour les éléments de schémas cinématiques, englobant les produits de toutes les branches de l'industrie. Il faut employer les symboles spécifiés à l'exécution des schémas de la documentation technique, ainsi que dans la littérature technique et pédagogique. La présente Norme internationale est publiée en trois parties,…
Industrial wheels for non-powered equipment — Dimensions and nominal load capacities
Specifies the definition of nominal load capacity, the classification of wheels, the specification of wheels, the determination of the category and selection of a wheel and the inspection conditions of industrial wheels and castors. An Annex gives nominal load capacities.
This second edition cancels and replaces the first edition (i. e. ISO 2080:1973). Includes terms widely used in the science and industry of elektrodeposition and metal- finishing. In addition to terms used in the three official ISO languages (English, French and Russian), this International Standard includes the equivalent terms in the German language.Elektrolytisches Herstellen von…
Ethanol for industrial use — Methods of test — Part 6: Test for miscibility with water
The principle of the procedure consists in addition of water to a test portion, under specified conditions, and examination for opalescence against a black background with side illumination, using a second Nessler cylinder containing water as the standard. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical…
Ethanol for industrial use — Methods of test — Part 7: Determination of methanol content (methanol c...
The principle is based on the conversion of methanol present in a test portion to formaldehyde by oxidation. The oxidation is carried out with a solution of potassium permanganate in phosphoric acid. Reaction of the formaldehyde formed with chromotropic acid (4,5-dihydroxynaphthalene-2,7-disulphonic acid). Photometric measurement of the violet coloration obtained at a wavelength of about 570 nm…
